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Theorem decbin0 9854
Description: Decompose base 4 into base 2. (Contributed by Mario Carneiro, 18-Feb-2014.)
Hypothesis
Ref Expression
decbin.1 𝐴 ∈ ℕ0
Assertion
Ref Expression
decbin0 (4 · 𝐴) = (2 · (2 · 𝐴))

Proof of Theorem decbin0
StepHypRef Expression
1 2t2e4 9397 . . 3 (2 · 2) = 4
21oveq1i 6062 . 2 ((2 · 2) · 𝐴) = (4 · 𝐴)
3 2cn 9313 . . 3 2 ∈ ℂ
4 decbin.1 . . . 4 𝐴 ∈ ℕ0
54nn0cni 9513 . . 3 𝐴 ∈ ℂ
63, 3, 5mulassi 8288 . 2 ((2 · 2) · 𝐴) = (2 · (2 · 𝐴))
72, 6eqtr3i 2257 1 (4 · 𝐴) = (2 · (2 · 𝐴))
Colors of variables: wff set class
Syntax hints:   = wceq 1398  wcel 2205  (class class class)co 6052   · cmul 8137  2c2 9293  4c4 9295  0cn0 9501
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-ext 2216  ax-sep 4230  ax-cnex 8223  ax-resscn 8224  ax-1cn 8225  ax-1re 8226  ax-icn 8227  ax-addcl 8228  ax-addrcl 8229  ax-mulcl 8230  ax-mulcom 8233  ax-addass 8234  ax-mulass 8235  ax-distr 8236  ax-1rid 8239  ax-rnegex 8241  ax-cnre 8243
This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1812  df-clab 2221  df-cleq 2227  df-clel 2230  df-nfc 2375  df-ral 2527  df-rex 2528  df-v 2817  df-un 3217  df-in 3219  df-ss 3226  df-sn 3697  df-pr 3698  df-op 3700  df-uni 3917  df-int 3952  df-br 4112  df-iota 5314  df-fv 5362  df-ov 6055  df-inn 9243  df-2 9301  df-3 9302  df-4 9303  df-n0 9502
This theorem is referenced by:  decbin2  9855
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